R coefficient

[teknikisler]

In the 1st and 2nd degree earthquake zones, it would be appropriate to choose the structure design as ductile. In this context, it is not recommended to install hollow blocks in these zones. But if it has to be done, since the ductility level of hollow floor slabs is considered normal, a curtained design is required. In this context, when the calculation is made, should the R coefficient be accepted as 4 by choosing normal in a hollow and curtained system, or should it be chosen as 7 like a curtained frame system. Or it would be more appropriate to accept it as a mixed system and accept it as 6.

 

[siromar]

Hello, if you want to make the hollow floor slab in the 1st and 2nd degree earthquake zones, if the system's Alpha s is more than 0.4, if it is already under the first condition, there is no permission, you need to increase the curtain section. You can calculate it with the formula in c and enter it as a value less than 6, again in the mixed system, you can enter R 6 for alphas greater than 0.66, and if alphaS is greater than 0.75, you can choose the system as normal ductile. related articles 2.5.3 -2.5.4